Acoustic Emission Monitoring of Wet H2S Cracking of Linepipe Steels: Application to Hydrogen-Induced Cracking and Stress-Oriented Hydrogen-Induced Cracking

摘要: Abstract Acoustic emission (AE) was used for monitoring steel cracking during exposure to wet hydrogen sulfide (H2S) environments. A method filtering AE data related hydrogen-induced (HIC) presented and applied several case studies. In a series of tests on unstressed sweet service steels, evolution indicated three successive HIC phases. An initial incubation period corresponded entry in the steel, which no occurred. Then two phases were detected. The first associated with decohesion weak interphases. second identified as crack propagation under high internal pressure. Crack decreased eventually ceased over time. Analysis then evaluate extent after sour exposure. Correlation found when appropriate applied. analysis also steels an load. exhibited signals. Its fracture surfa...